1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11
10// <experimental/type_traits>
11
12#include <experimental/type_traits>
13#include <string>
14
15#include "test_macros.h"
16
17namespace ex = std::experimental;
18
19template <typename T>
20 using callFoo = decltype(std::declval<T&>().Foo());
21
22struct yesFoo {
23 int Foo() { return 0; }
24};
25
26struct noFoo {
27};
28
29struct wrongFoo {
30 std::string Foo() { return ""; }
31};
32
33struct convertibleFoo {
34 long Foo() { return 0; }
35};
36
37template <typename T, bool b>
38void test() {
39 static_assert( b == ex::is_detected_exact <int, callFoo, T>::value, "" );
40 static_assert( b == ex::is_detected_exact_v<int, callFoo, T>, "" );
41}
42
43int main(int, char**) {
44 test<yesFoo, true>();
45 test<noFoo, false>();
46 test<wrongFoo, false>();
47 test<convertibleFoo, false>();
48
49 return 0;
50}
51

source code of libcxx/test/std/experimental/utilities/meta/meta.detect/is_detected_exact.pass.cpp